Which two pioneer species help break up
rock to create a substrate rich in organic
material. starts the process of creating
soil in a newly created environment.

Answer:

1. highest is 25.7c° and lowest is 20.0c°

2.Is Exothermic.  An Endothermic Reaction is a chemical reaction that absorbs energy in the form of light or heat. In it, the energy or enthalpy of the reactants is less than that of the products. An Exothermic Reaction is a chemical reaction that gives off energy in the form of light or heat.

3. Reactans.

4. The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

This exercise is from Barbershop can keep men healthy by Joseph Ravenell, and is related to High Blood Pressure.

Mr. Ravenell describes the essence of the black barbershop as a place where there is friendship, trust and cooperation, and peace. (1a)

He considers it a safe haven because is void of stress and societal threats. (1b)

Some of the health-related topics that were discussed in the barbershop include but are not limited to:

Denny states that black men trust their barbers more than their doctors because most of them relate more with their barbers than with their doctors.

Mr. Ravenell taught barbers how to measure blood pressure, and how to counsel their customers to go see a doctor if their blood pressure was too high.

It was discovered that the number of those whose blood pressure were controlled in the 18 shops that were studied for one year were higher in the shops where the barbers had been trained.

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The total pressure of the mixture of hydrogen and nitrogen gases in the container is 101.0 kPa.

To find the total pressure of a mixture of hydrogen and nitrogen gases, we need to consider Dalton's law of partial pressures, which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of each gas.

Given that the partial pressure of hydrogen is 34.0 kPa and the partial pressure of nitrogen is 67.0 kPa, we can calculate the total pressure by adding these values together.

Total pressure = partial pressure of hydrogen + partial pressure of nitrogen

Total pressure = 34.0 kPa + 67.0 kPa

Total pressure = 101.0 kPa

Therefore, the total pressure of the mixture of hydrogen and nitrogen gases in the container is 101.0 kPa. This means that the combined pressure exerted by both gases is 101.0 kilopascals.

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Answer:

The correct answer is Hollow Sphere.

Answer:

No.

Explanation:

Weight is the measure of the gravitational force between two massive things.

W = g . m

g = gravity

m = mass

Also, we can say that gravity is equal to G.M/d² where G is the constant of Newton's gravity, M the massa of the corp and d is their distance.

In Einstein's theory, that's not true, but it works for small gravitys.

The description of the question is the definition of density.

Answer: its c im pretty sure

Explanation:

An aquifer receives 40 m 3 of precipitation and loses 10 m 3 of water through natural movement. 30 m³water can be pumped from the aquifer to balance the budget. Therefore, option C is correct.

An aquifer is a layer of unconsolidated materials, rock cracks, or water-bearing, porous rock that is underground. A water well can be used to obtain groundwater from aquifers. Aquifers come in a wide range of varieties.

Stormwater from precipitation and snowmelt seeps into the ground until it reaches layers of impermeable rock that prevent the water from passing through, storing it there instead. Stormwater that percolates into the soil replenishes aquifers' permeable rocks.

As a source of freshwater for metropolitan areas and agricultural irrigation, aquifers are crucial. Aquifers are located all over California, unlike surface water, which is mainly found in the state's northern and eastern regions.

The water pumped from the aquifer can be determined as follows;

10 + m = 40

m = 40 - 10

m = 30 m³

Thus, option C is correct.

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Answer:

Quito is the one..

Explanation:

Because the difference in energy between orbits is different in different types of atoms, moving electrons between different orbits requires photons carrying different amounts of energy (different wavelengths).

Digital fluoroscopy eliminates post-procedure overhead images. The correct answer is option (a) post-procedure overhead images.

In many cases, digital fluoroscopy eliminates post-procedure overhead images, as they allow the radiologists to view high-quality images on their screens in real-time. Digital fluoroscopy is a technique used by doctors to obtain live images of the internal structures of the body using an X-ray machine. This technology provides detailed images that can be displayed on a monitor in real-time, allowing doctors to view the body's movements as they happen. The image data is processed by an analog-to-digital converter, and the resulting digital images can be stored and transmitted electronically. Furthermore, automatic exposure control helps to minimize radiation exposure while still producing high-quality images.

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The statement that is NOT true about diazonium salts is d. Diazotization and coupling reactions must be performed at least 1 suppress the hydrolysis of the diazonium salt.

Diazonium salts are compounds that contain a positive charged nitrogen atom (N⁺) and are commonly used as intermediates in organic synthesis. They are formed through a reaction called diazotization, which involves the conversion of a primary aromatic amine to its corresponding diazonium salt by treating it with nitrous acid.

Aryldiazonium salts (where R is an aryl group) are used in the synthesis of commercially available dyes through coupling reactions between activated aromatic compounds. On the other hand, alkyldiazonium salts (where R is an alkyl group) are unstable and likely to decompose, giving a variety of products because N2 is far more stable than R-N2.

Aryldiazonium salts are moderately stable in water at 0 °C because the system of the aromatic ring stabilizes the pi system of the N2+, the diazonium ion. However, diazonium salts are generally unstable in water and can undergo hydrolysis to produce the corresponding phenol or amine. Therefore, diazotization and coupling reactions must be performed in a dry, organic solvent to suppress the hydrolysis of the diazonium salt.

Therefore, option d is NOT true as it states that diazotization and coupling reactions must be performed to suppress the hydrolysis of the diazonium salt, while in reality, these reactions are performed in dry, organic solvents to avoid hydrolysis.

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Answer:

increase the amount

Explanation:

jus took the test

The pressure is dependent on the area over which the force is acting, the pressure can be increased or decreased without any change in the force. Here on increasing the pressure, the amount of gas on the solution increases. The correct option is A.

The force which is applied perpendicular to the surface of an object per unit area over which the force is distributed is known as the pressure. In the field of chemistry, the pressure arises due to the movement of molecules and their collision with one another and the walls of the vessel.

All gases exert pressure, it is one of the fundamental measurable quantities of this phase of matter. Even our atmosphere exerts pressure. The pressure of the atmosphere is 101,325 Pa. The SI unit of pressure is Pascal.

Here when Naomi has increased the pressure on a solution of liquid and gas in a closed container, the amount of gas also increases.

Thus the correct option is A.

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Answer:

Explanation:

Sodium Chloride = Na⁺ + Cl⁻ = NaCl

Lithium bromide = Li⁺ + Br⁻ = LiBr

Magnesium fluoride = Mg ⁺²  +  F⁻ = Mg₂F.

Potassium Oxide = K⁺ + O⁻² = K₂O

Calcium sulphide  = Ca⁺² + S⁻² = CaS

Aluminum Iodide = Al⁺³ + I⁻ = Al I₃

Barium bromide = Ba⁺² + Br⁻ = BaBr₂

Aluminum sulphide = Al⁺³ + S⁻ = Al₂S₃

Calcium Phosphide = Ca⁺² + P⁻³ = Ca₃P₂

Lithium Nitride = Li⁺ + N⁻³ = Li₃N

Magnesium Oxide = Mg⁺² + O⁻² = MgO

Aluminum Fluoride = Al⁺³ + F⁻ = AlF₃

Lithium Oxide = Li⁺ + O⁻² = Li₂O

Beryllium iodide = Be⁺² + I⁻ = BeI₂

Answer:

Trilobite fossils are found worldwide, with many thousands of known species. ... Because of their diversity and an easily fossilized exoskeleton, they left an extensive fossil record with some 17,000 known species spanning Paleozoic time.

Let me know if this help

Explanation:

Depending on the area and the movement of the plates, the fossils would be kind of close to each other. Maybe about a couple feet at the farthest in one area, almost everywhere.

A single replacement reaction is a type of chemical reaction that takes place when one element in a compound is replaced by another element. In other words, in this reaction, one element is replaced by another element. There are a few ways to predict whether or not a single replacement reaction will occur.

These ways are explained below: Paying Attention to ReactantsThe first way to predict if a single replacement reaction will occur is by paying attention to the reactants. In a single replacement reaction, a more reactive element will replace a less reactive element. For example, if a metal element is mixed with an aqueous solution that contains ions of another metal, a single replacement reaction will occur if the metal in the solid state is more reactive than the metal in the solution state. For instance, if you put zinc in copper sulfate, a reaction will occur because zinc is more reactive than copper. Therefore, it will replace copper, producing zinc sulfate and copper.Using the Activity SeriesAnother way to predict if a single replacement reaction will occur is by using the activity series. The activity series is a list of metals and their ability to replace other metals from their compounds. This list is arranged in order of decreasing activity. Therefore, if a metal is more active than another metal on the activity series, it will replace that metal from its compound. For example, if you put magnesium in silver nitrate, a reaction will occur because magnesium is more reactive than silver. Therefore, magnesium will replace the silver, producing magnesium nitrate and silver. If the metal is less active than another metal on the activity series, no reaction will occur.Using Electrochemical SeriesThe electrochemical series is another way to predict if a single replacement reaction will occur. The electrochemical series lists the elements in order of their standard reduction potentials. A metal with a higher reduction potential will replace a metal with a lower reduction potential from its compound. For instance, if you put copper in magnesium sulfate, no reaction will occur because copper has a lower reduction potential than magnesium. Therefore, magnesium will not replace copper from its compound.

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The minimum volume of a 0.100 M calcium hydroxide solution required to neutralize all of the dimethylglycine is 41.2 mL.

The balanced chemical equation for the reaction between dimethylglycine and calcium hydroxide is:

N(CH3)2CH2COOH + Ca(OH)2 → Ca(N(CH3)2CH2COO)2 + 2H2O

From the equation, we can see that 1 mole of dimethylglycine reacts with 1 mole of calcium hydroxide. We can use this information to calculate the amount of calcium hydroxide required to neutralize the acid.

First, we need to determine the number of moles of dimethylglycine in the sample:

molar mass of dimethylglycine = 115.13 g/mol

number of moles = 475 mg / 1000 mg/g / 115.13 g/mol = 0.00412 mol

Since 1 mole of dimethylglycine reacts with 1 mole of calcium hydroxide, we need 0.00412 mol of calcium hydroxide to neutralize the acid.

Finally, we can use the molarity of the calcium hydroxide solution to determine the volume required:

moles of Ca(OH)2 = 0.00412 mol

volume of Ca(OH)2 solution = moles / molarity = 0.00412 mol / 0.100 mol/L = 0.0412 L

Converting this to milliliters:

volume of Ca(OH)2 solution = 41.2 mL

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Answer:

The ship's wheel is an example of a wheel and axle. It creates a mechanical advantage for the sailor because she can apply a small force over a large distance by turning the big ship's wheel.

(please mark brainliest if it's correct <33)

Answer:

friction and air resistance

at terminal velocity, the weight of the object due to gravity is balanced by the frictional forces, and the resultant force is zero.

Answer: Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. The chemical symbol for Uranium is U. Electron configuration of Uranium is [Rn] 5f3 6d1 7s2. Possible oxidation states are +3,4,5,6.

Explanation:

Answer:

Electron configuration of uranium at its ground state: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6s6 5f3 6d1 7s2

Noble gas configuration: [Rn] 5f3 6d1 7s2.

A hypothetical radioactive isotope has a half-life of 100,000 years. if the ratio of radioactive parent to stable daughter product is 1:7, the rock containing the radioactive material old is 3 × 10⁵ .

given that , ratio of radioactive parent to stable daughter product is 1:7.

No /  N = 1/  1+ 7

therefore , N / No = 1 / 8

the half-life = 1 × 10⁵  yrs

by using the expression give as :

0.693 / 1 × 10⁵ t = 2.303 log  No / N

0.693 / 1 × 10⁵  t = 2.302 log 8

0.693 t = 2.303 × 0.903 × 10⁵

0.693 t = 2.079 × 10⁵

t = (2.079 / 0.693 ) × 10⁵

t = 3 × 10⁵  yr old.

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Answer:

25000mL, 0.025m³, 0.88ft³, 25dm³

Explanation:

Para resolver esta pregunta debes tener claros los factores de conversión:

1L = 1000mL

1000L = 1m³

1L = 0.035315ft³

1L = 1dm³

25L son:

25L * (1000mL / 1L) = 25000mL

25L * (1m³ / 1000L) = 0.025m³

25L * (0.035315ft³ / 1L) = 0.88ft³

25L * (1dm³ / 1L) = 25dm³

A certain reaction has an activation energy of 58.74 kj/mol. At 507 kelvin temperature, the reaction proceed 7.00 times faster than it did at 337 k.

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances. The most popular scales are the Kelvin scale (K), which is mostly used for scientific purposes, the Fahrenheit scale (°F), and the Celsius scale, which has the unit symbol °C.

1/T2 - 1/T1 = -Ea/(R×ln(k2/k1))

1/T2 - 1/T1 = -Ea/(R×ln7)

T2 = 1/(1/T1 - Ea/(Rln(7)))

T2 = 1/(1/337 - 58.74/(8.314×1.94591)) = 507 K

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The nucleus more easily, increasing the probability of causing fission many nuclei like U234, U236, and U238 undergo fission only by fast neutrons.

Fission can be caused by slow as well as fast neutrons. It is the energy of the neutron which determines its effectiveness in causing fission. Fast neutrons are more effective in causing fission. Hence, many nuclei like U234, U236, and U238 undergo fission only by fast neutrons.

Fission is a nuclear reaction process in which the nucleus of an atom is split into two smaller nuclei with the release of a large amount of energy and two or three neutrons. Uranium-235 (U-235) and Plutonium-239 (Pu-239) are the most commonly used fissile materials, but other materials like U-234, U-236, and U-238 can also undergo fission. When a neutron is absorbed by the nucleus of a fissile material like U-235 or Pu-239, it becomes unstable and splits into two smaller nuclei with the release of a large amount of energy.

The fission process also releases two or three neutrons, which can cause further fission of other nuclei, leading to a chain reaction. The chain reaction can be controlled by using a neutron moderator, which slows down the fast neutrons, making them more effective in causing fission. The efficiency of the fission reaction depends on the energy of the neutron.

Fast neutrons are more effective in causing fission than slow neutrons, which have less energy. This is because fast neutrons can penetrate the nucleus more easily, increasing the probability of causing fission. Hence, many nuclei like U234, U236, and U238 undergo fission only by fast neutrons.

Fast neutrons are more effective in causing fission than slow neutrons, which have less energy.

This is because fast neutrons can penetrate the nucleus more easily, increasing the probability of causing fission. Hence, many nuclei like U234, U236, and U238 undergo fission only by fast neutrons.

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Answer: Mass is the amount of matter in a substance. Volume is the amount of space matter takes up. Matter has both physical and chemical properties.

Explanation:Y w

Answer:

pollution

Explanation:

use humans have a lot to do with pollution

Answer: 1. 20.0 grams

2. 0.272 moles

3. B) Mass --> Moles --> Volume

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number \(6.023\times 10^{23}\) of particles.

To calculate the number of moles, we use the equation:

\(\text{Number of moles}=\frac{\text{Given molecules}}{\text{Avogadros number}}\) or

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\) or  

Putting in the values we get:

1. \(\text{Number of moles of} Cl_2=\frac{1.7\times 10^{23}}{6.023\times 10^{23}}=0.282moles\)

Mass of \(Cl_2=moles\times {\text {Molar mass}}=0.282mol\times 71g/mol=20.0g\)

2. \(\text{Number of moles of NaCl}=\frac{3.28\times 10^{23}}{2\times 6.023\times 10^{23}}=0.272moles\)

3. \(\text{Number of moles of water}=\frac{26g}{18g/mol}=1.44moles\)

Volume of water =\(moles\times {\text {Molar volume}}=1.44mol\times 22.4L/mol=32.4L\)

Answer:

22.4 Liters at STP

Explanation:

General Rule => Any (ALL) gas will occupy 22.4 Liters at Standard Conditions (STP).

Answer:

true!

Explanation:

The given statement " When ionic bonds form, they produce individual molecules, each of which consists of a fixed number of positive and negative ions" is false because  they produce a crystal lattice structure, in which each positive ion is surrounded by a fixed number of negative ions, and vice versa.

When ionic bonds form, they produce a crystal lattice structure, in which each positive ion is surrounded by a fixed number of negative ions, and vice versa.

The lattice structure extends indefinitely in all directions, forming a solid compound. Therefore, ionic compounds do not exist as discrete molecules with a fixed number of ions.

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